WordNet sense 1 ((used informally) very small):

bitty, itsy-bitsy, itty-bitty, teensy, teensy-weensy, teeny, teeny-weeny, weensy, weeny, bittie, teentsy

WordNet sense 2 (limited or below average in number or quantity or magnitude or extent):

little

WordNet sense 3 (at or near the beginning of a period of time or course of events or before the usual or expected time):

early

WordNet sense 4 (eliminate urine):

make, pee, piddle, piss, puddle, urinate, micturate, pee-pee, wee-wee, make water, pass water, relieve oneself, spend a penny, take a leak